Mathematics College

(09.02)
Solve x2 - 8x - 20 = 0. (1 point)
x = 4, x = -5
x = -4, x = 5
x = 2, x = -10
x = -2, x = 10

Answers

Answer 1

Answer:

x = - 2, x = 10

Step-by-step explanation:

Given

x² - 8x - 20 = 0

Consider the factors of the constant term (- 20) which sum to give the coefficient of the x- term (- 8)

The factors are - 10 and + 2 , since

- 10 × 2 = - 20 and - 10 + 2 = - 8 , then

(x - 10)(x + 2) = 0

Equate each factor to zero and soilve for x

x + 2 = 0 ⇒ x = - 2

x - 10 = 0 ⇒ x = 10

Related Questions

an area of a hexagon of 15 feets sides
​

Answers

Answer:

225

Step-by-step explanation:

All else being equal, a study with which margin of error would give you the most confidence in the results?
A. +15 percentage points
B. +20 percentage points
C. +10 percentage points
D. +5 percentage points

Answers

Answer:

Is D

Step-by-step explanation:

A margin error with +5 percentage points will give the most confidence in the results.

What is margin of error?

The range of values below and above the sample statistics in a confidence interval.

According to the given question

for

+15 percentage points error of margin the confidence interval will be 85%.

+20 percentage points error of margin the confidence interval will be 80%.

+10 percentage points error of margin the confidence interval will be 90%

+5 percentage points error of margin the confidence interval will be  95%

Hence,  +5 percentage error of margin will give the most confidence in the result.

Learn more about margin of error  here:

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Find the missing lengths in the figure below. Then, find the perimeter of the figure. All measurements are in inches.

Answers

Answer:

A = 1.83 inches

B = 0.62 inches

C = 1.82 inches

D and E = 2.71 inches

Step-by-step explanation:

Cassidy is using six different pontominoes to make a rectangle
Which pentominoes should she use to complete her figure?
11
TL
HTL
ор.
Rovie

Answers

Answer:

D

Step-by-step explanation:

D

Find the distance between the two points in simplest radical form.
(3, – 9) and (-3,-1)

Answers

Answer:

[tex]distance = \sqrt{ {( - 3 - 3)}^{2} + {( - 1 - ( - 9))}^{2} } \\ = \sqrt{36 + 64} \\ = \sqrt{100} \\ = 10 \: units[/tex]

Plz help me well mark brainliest if correct!!...

Answers

Answer:

c

Step-by-step explanation:

De un saco de frutas que contiene 3 naranjas, 2 manzanas, y 3 plátanos, una muestra aleatoria de 2 piezas de se selecciona la fruta. Si X es el número de naranjas e Y es el número de manzanas en la muestra, encuentre
(a) la distribución de probabilidad conjunta de X y Y, muestre la tabla de distribución;

(b) Pruebe que la suma de columnas y renglones nos entregan las distribuciones marginales de X , Y

(c) Calcule P(Y = 0|X = 2)

(d) Demuestre que las variables aleatorias X ,Y no son estadísticamente independientes

Answers

Answer:

ok

Step-by-step explanation:

i phone you have a great day but I don't think it will be a good pic of your face is it a good day today and tomorrow to drink seculari sec to

Find the value of x. 2x - 5 > 7 *

Answers

Answer:

[tex]x>6[/tex]

Step-by-step explanation:

Answer:

x > 6

Step-by-step explanation:

HELP NO LINKS OR IMAGES WILL GIFT 20+ POINTS IF YOU ANSWER IT CORRECTLY I NEED HELP

Answers

Answer:

≈ 42.85

or 30π

semi-circle is (dπ)*1/2 +d , but we don't need the +d since we don't have that edge so you only use (dπ)*1/2.

From there, and equalateral triangle has all the same sides, so you can assume that the two sides of the triangle added up would be 24.

Finally you add the product of (dπ)*1/2 with 24, and depending on whether it needs to be in exact terms (the decimal) or in terms of pi (the 30 one) you can change it to how it needs to be.

Which point is located at (0.25,-0.5)?
R
Х
-6
point A
O point
point R
PLEASE AWNSER ASAP!
ILL GIVE BRAINLEST! (If that’s how u soell it) stay silly fun

Answers

Answer:

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Here is a list of numbers.
-45
-21
-16
12
33
40
a) Write down two numbers from the list that add up to -9.
b) Write down two numbers from the list that have a difference of 29.
c) Work out the sum of all the numbers in the list.
​

Answers

Answer:

(a): -21 and 12.

(b): -45 and -16

(c): 3.

Step-by-step explanation:

(a): -21 + 12 = -9.

(b): -45 - -16 = 29.

(c): -45 + -21 + -16 + 12 + 33 + 40 = 3.

what is consistent???

Answers

Answer:

being accurate in most times

Answer:

What are you asking

consistent:acting or done in the same way over time, especially so as to be fair or accurate

Step-by-step explanation:

From the top of an 95 meter cliff, Tim spots a hiker down below at an angle
of depression of 22 degrees. To the closest meter, how far is the hiker from
the base of the cliff?

Answers

Step-by-step explanation:

jsvsbsbbssnbshsshvsvsv

Given
mZQPS is a straight angle
mZQPR = 72 – 4°
mZRPS = 9x - 40°
Find mZQPR:
P

Answers

9514 1404 393

Answer:

  m∠QPR = 94°

Step-by-step explanation:

Given:

  m∠QPS = 180°

  m∠QPR = 7x -4°

  m∠RPS = 9x -40°

Find:

  m∠QPR

Solution:

  m∠QPR + m∠QPR = 180°

  (7x -4°) +(9x -40°) = 180°

  16x = 224° . . . . . . . . . . . . . add 44°

  x = 14° . . . . . . . . . . . . . divide by 16

  m∠QPR = 7x -4° = 7(14°) -4°

  m∠QPR = 94°

A box of cards has 12 birthday cards. Each card weighs 2 ounces. How much do the 12 cards weigh?
A. 1 pound 4 ounces
B. 1 pound 8 ounces
C. 2 pounds 4 ounces
D. 2 pounds 8 ounces

Answers

Answer:

B. 1 pound, 8 ounces!

Step-by-step explanation:

12 x 2ounces =24 ounces

16 ounces is one pound so 24-16=8 ounces left over. 1 pound, 8 ounces

Find the value of x | Please!

Answers

Answer:

x=20

Step-by-step explanation:

its a straight line.

straight line=180 degrees

60+40=180

80/4=20

20=x

Answer:

20

Step-by-step explanation:

The whole angle is 180 if we add 60 and 40 = 100

then 180 - 100 = 80

then 80 divide by 4 = 20.

in the diagram below ,find the value angle of the angle marked BCD.​

Answers

Answer:

55°

Step-by-step explanation:

In triangle BAC, angle C =

180° - 90° - 70°

Angle C = 20°

In triangle DAB, angle C =

180° - 90° - 55°

Angle C = 35°

Add both angles

20° + 35° = 55°

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Which of the following are equations for the line shown below? Check all that apply. O A. y=-3x-3 O B. y+ 5= 3(x- 1) O C. y= 3x-2 O D. y-4 = 3(x+ 2)

Answers

Answer:

B

Step-by-step explanation:

What is the diameter of the circle?
12 inches
A
6 inches
B
24 inches
с
26 inches
D
48 inches

Answers

You need to include the image of the question it doesn’t make sense if

PLEASE HELP!!!!! !!!!!!!!!!!!

Answers

Answer:

31.9secs

6,183.3m

Step-by-step explanation:

Given the equation that models the height expressed as;

h(t ) = -4.9t²+313t+269

At the the max g=height, the velocity is zero

dh/dt = 0

dh/dt = -9,8t+313

0 = -9.8t + 313

9.8t = 313

t = 313/9.8

t = 31.94secs

Hence it takes the rocket 31.9secs to reach the max height

Get the max height

Recall that h(t ) = -4.9t²+313t+269

h(31.9) = -4.9(31.9)²+313(31.9)+269

h(31.9) = -4,070.44+9,984.7+269

h(31.9) = 6,183.3m

Hence the maximum height reached is 6,183.3m

PLssssssssssssssssssssssssssssssssss help.

Answers

Answer:

C

Step-by-step explanation:

PLEASE HELP I DON'T KNOW

Answers

Answer:

radius

Step-by-step explanation:

Answer:

It is the radius

Step-by-step explanation:

PLEASE HELP QUICK!!

Rachel works for a clothing store. She is paid $150 every week plus a 10% commission on any clothes that she sells. Which of the following is true in regards to Rachel's weekly paycheck?


A. $100 in clothing sales gives Rachel a $250 paycheck

B. $1,100 in clothing sales gives Rachel a $260 paycheck

C. $4,200 in clothing sales gives Rachel a $420 paycheck

D. $16,000 in clothing sales gives Rachel a 1,450 paycheck

Answers

Answer:

A-false  B-true  C-false  D-false

Step-by-step explanation:

We just have to calculate a lot!

A.

100*10%=10

10+150=160

NOPE

B

1100*10%=110

110+150=260

YUP

C

4200*10%=420

420+150=570

NOPE

D

16000*10%=1600

1600+150=1750

NOPE

All false I just had this question on test

What is the exponential of 3 · 3 · 2 · 4 · 4 · 4 · 4 ?

Answers

3^2 * 3 * 4^4 is the correct form
Your welcome ☺️

Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol ( μ, rho, σ) for the indicated parameter. A psychologist claims that more than 5.8 percent of the population suffers from professional problems due to extreme shyness. Use p, the true percentage of the population that suffers from extreme shyness.
a) H0 : p = 5.8%
H1 : p < 5.8%
b) H0 : p = 5.8%
H1 : p ≥ 5.8%
c) H0 : p = 5.8%
H1 : p > 5.8%
d) H0 : p = 5.8%
H1 : p ≤ 5.8%

Answers

Answer:

c) H0 : p = 5.8%

H1 : p > 5.8%

Step-by-step explanation:

At the null hypothesis, we test that the percentage is equal to a certain value. At the alternate hypothesis, we have a test about this percentage, if it is more, less, or different from the tested value.

A psychologist claims that more than 5.8 percent of the population suffers from professional problems due to extreme shyness

At the null hypothesis, we test if the percentage is 5.8%

[tex]H_0: p = 5.8\%[/tex]

At the alternate hypothesis, we test if this percentage is more than 5.8%. So

[tex]H_a: p > 5.8\%[/tex]

This means that the correct answer is given by option c.

Answer:

c) H0 : p = 5.8%

H1 : p > 5.8%

Step-by-step explanation:

Hope this helps

Can someone help me with this ?

Answers

use pythagora's theorem to solve it
c^2=a^2+b^2
x^2=(3/4)^2+1^2
x^2=25/16
x= 5/4 = 1 1/4 inch
therefore it is B
it is b
step by step

4(w+1)=−6

w = ?
HURRY FAST!

Answers

Answer:

4w+4=-6

4w=-6-4

4w=-10

4w/4=-10/4

w=-2.5

Round you answer to the nearest cent

Answers

Answer:

$2.00

Step-by-step explanation:

For cost $4.23  cost of 1 pound apple = $1.9

For cost $5.9   cost of 1 pound apple = $1.7

For cost $7.61   cost of 1 pound apple = $1.7

For the given mixed fraction,

[tex]2\frac{1}{2}[/tex] pound

The simple faction of  it = 5/2 pound

Now dividing 5 by 2 to get decimal form,

Therefore,

5/2 pound = 2.25 pound

2.25 pound apple cost = $4.23

Hence 1 pound cost = 4.23/2.25

                                  = $1.9

For the given mixed fraction,

[tex]3\frac{1}{2}[/tex]

The simple faction of  it = 7/2

Now dividing 5 by 2 to get decimal form,

Therefore,

7/2 = 3.5

Since, cost of 3.5 pound apple = $5.9

Therefore,

1 pound apple = 5.9/3.5

                        = $1.7

For the given mixed fraction,

[tex]4\frac{1}{2}[/tex]

The simple faction of  it = 9/2

Now dividing 5 by 2 to get decimal form,

Therefore,

9/2 = 4.5

Since, cost of 4.5 pound apple = $7.61

Therefore,

1 pound apple = 7.61/4.5

                        = $1.7

Learn more about the fraction visit:

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What is the constant of proportionality in the equation y=1/2x

Answers

Answer:

1/2

Step-by-step explanation:

1/2 is the constant of proportionality in given equation.

Hope this helps....

Have a good day ahead :)

QUESTION 1 of 10: Many companies use cloud-based, automated accounting systems to implement the principles of T-accounts. A vendor
tries to sell you a subscription at $40 per user per month. You need 3 users to access the system. What will your annual cost be?
ОООО
a) $40
Ob) $120
C) $360
d) $1,440

Answers

D) $1,440
___________________
•Month to Annual means 1 to 12

•So 40 per month means 480 (40 x 12)

•Multiple that by each user.

•480 x 3 = 1440
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